Article
Chemistry, Physical
Martin Motola, Raul Zazpe, Ludek Hromadko, Jan Prikryl, Veronika Cicmancova, Jhonatan Rodriguez-Pereira, Hanna Sopha, Jan M. Macak
Summary: A reconstruction process of TiO2 nanotube (TNT) layers was conducted to enhance their photoelectrochemical performance and photocatalytic activity. By preparing double-wall (DW) TNT layers, etching the inner wall to obtain single-wall (SW) TNT layers, and coating with TiO2 coatings of different thicknesses, significant improvements were achieved in incident photon-to-electron conversion efficiency and photocatalytic performance compared to untreated TNT layers.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Tzu-Kang Chin, Ming-Wei Liao, Tsong-Pyng Perng
Summary: A new hierarchical fiber structure composed of TiOxN1-x and TiN@nitrogen-doped carbon hollow fibers was formed by direct nitridation of a TiO2-coated polysulfone (PSF) hollow fiber. X-ray photoelectron spectrometric and Raman spectroscopic analysis indicated that the nitridation of TiO2 and carbonization of PSF proceeded independently and simultaneously, resulting in highly conductive fibers.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Physics, Applied
Yuanshen Qi, Xianbin Xu, Igor Krylov, Moshe Eizenberg
Summary: The study reports the observation of ferroelectricity in hafnium-zirconium-oxide thin films deposited at a low temperature without post-annealing, demonstrated by a polarization-voltage hysteresis loop and achieved 2P(r) value. Grazing incidence x-ray diffraction and atomic-resolution scanning transmission electron microscopy characterization revealed the co-existence of crystallized polar phases in the as-deposited sample.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Daying Guo, Zhixin Wan, Guoyong Fang, Mengqi Zhu, Bin Xi
Summary: A highly active and durable electrocatalyst for the hydrogen evolution reaction (HER) has been reported. The catalyst demonstrates excellent performance in alkaline and neutral mediums. A ternary composite material with a tandem interface strategy is used, which allows for superior HER performance through the modulation of heterointerface and intermediates electronic structure.
Article
Chemistry, Physical
Yanhui Chen, Yueshuai Wang, Lirong Zheng, Yukun Chang, Shiyu Xu, Yahang Wu, Wenyuan Zhou, Yue Lu, Jinshu Wang, Hongyi Li
Summary: In this study, the performance of Pt catalyst for hydrogen evolution was improved by fabricating TiO2 nanotube arrays on titanium substrate and subsequently loading Pt nanoclusters through chemical bonding. The stability and capability for hydrogen evolution of Pt catalyst were enhanced by the Ti-O-Pt bond. Furthermore, the 3D porous titanium substrate with open structure further improved the performance of hydrogen evolution reaction.
MATERIALS TODAY ENERGY
(2022)
Article
Energy & Fuels
Hongyan Xu, Nasrin Siraj Lopa, Mohammad Karbalaei Akbari, Di Wu, Jie Hu, Serge Zhuiykov
Summary: Two-dimensional conformal SnO2-Ga2O3 n-p heterostructures were fabricated on a wafer scale using atomic layer deposition. After annealing at 250 degrees C for 1 h in air, the heterostructures exhibited a high specific capacitance of 167 F g-1 at a current density of 7.69 A g-1. Even after 10,000 continuous cycles, the sub-10 nm thick heterostructures demonstrated a high capacitance retention of -92.55%. These findings highlight the potential of ultra-thin 2D SnO2-Ga2O3 heterostructures for high-performance energy storage devices.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Physics, Applied
Yong Chan Jung, Jin-Hyun Kim, Heber Hernandez-Arriaga, Jaidah Mohan, Su Min Hwang, Dan N. Le, Akshay Sahota, Harrison Sejoon Kim, Kihyun Kim, Rino Choi, Chang-Yong Nam, Daniel Alvarez, Jeffrey Spiegelman, Si Joon Kim, Jiyoung Kim
Summary: This study investigates the robust ferroelectric properties of low-temperature (350 ?) Hf0.5Zr0.5O2 (HZO) films. It is found that the use of anhydrous H2O2 oxidant enables the HZO films to fully crystallize at a lower temperature, with fewer defects. Additionally, this low-temperature crystallization process improves device reliability by suppressing electrode oxidation.
APPLIED PHYSICS LETTERS
(2022)
Article
Electrochemistry
Bilal Bawab, Sitaramanjaneya M. Thalluri, Jhonatan Rodriguez-Pereira, Hanna Sopha, Raul Zazpe, Jan M. Macak
Summary: Pd nanoparticles prepared by ALD show good performance in methanol electro-oxidation, with TNT layers as the supporting material effectively preventing the formation of electrochemical poisoning species. Different Pd loadings influence the particle size of Pd and electrocatalytic performance.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Yuehong Zeng, Huiming Wang, Muhammad Rauf, Hongwei Mi, Lingna Sun, Qixing Wu, Qianling Zhang, Xiangzhong Ren, Yongliang Li
Summary: In this study, a synergistic effect between carbon nanotube (CNT) network and atomic layer deposition (ALD) of TiO2 is reported. The CNTs and TiO2 work together to capture zinc ions and suppress dendrite growth, resulting in uniform deposition during repeated cycles. The modified anode (TiO2-CNT@Zn anode) exhibits high plating/stripping reversibility and ultralong lifespan. Furthermore, the Zn-MnO2 battery with the TiO2-CNT@Zn anode shows enhanced cycling stability.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Cuicui Ling, Bingxin Feng, Xiaomeng Wang, Lingtan Zhang, Tuo Zhang, Min Cao, Daoyong Yu, Xin Xue, Qingzhong Xue, Jianqiang Zhang, Chuanke Wang, Lei Zhu, Haipeng Lu, Wenpeng Liu
Summary: In this study, the researchers developed a self-powered photodetector using a SnO2 nano litchi shell structure/n-Si heterojunction. The device exhibited excellent broadband light absorption and had potential applications in biomedical, environmental monitoring, and military reconnaissance.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
P. Birnal, M. C. Marco de Lucas, I. Pochard, F. Herbst, O. Heintz, L. Saviot, B. Domenichini, L. Imhoff
Summary: TiO2-Au composite planar films and inverse opals were synthesized using ALD, showing excellent photocatalytic performance. The results highlight the potential of ALD in the field of photocatalysis.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Kang Yuan, Zhimin Yu, Li Yang, Yang Yang, Jiaming Sun
Summary: Near-infrared electroluminescence (EL) at 1067 nm was achieved from Ga2O3:Nd nanolaminates fabricated by atomic layer deposition on silicon. The emissions are activated by both forward and reverse biases, and the devices show high quantum efficiency and optical power density. The work provides innovative nanofilms based on Nd-doped oxides with potential applications in Si-based photonics and integrated optoelectronics.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhimin Yu, Yang Yang, Jiaming Sun
Summary: Erbium-doped ZnGa2O4 spinel nanofilms were fabricated by atomic layer deposition on Si substrates, producing intense near-infrared emission at 1.53 μm in the resulting electroluminescence (EL) devices. Optimization of EL performance was achieved by annealing at 800 °C with a Ga/Zn ratio of 2.0, resulting in a high external quantum efficiency of 0.31% and a decay lifetime of 815 μs.
Article
Nanoscience & Nanotechnology
Benjamin D. Wiltshire, Mahnaz Alijani, Hanna Sopha, David Pavlinak, Ludek Hromadko, Raul Zazpe, Sitaramanjaneya M. Thalluri, Eva Kolibalova, Jan M. Macak, Mohammad H. Zarifi
Summary: To detect visible light at gigahertz frequencies, a planar microwave resonator was integrated with a high aspect ratio TiO2 nanotube (TNT) layer-sensitized CdS coating using atomic layer deposition (ALD). This integration improved the performance of light detection devices in digital technology. The CdS-coated TNT layer showed sensitivity to visible light up to a wavelength of approximately 650nm, and enhanced sensitivity to green and red light compared to the blank TNT layers. The CdS coating also improved the sensor's response to light exposure and resulted in shorter recovery times.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Jinshan Wang, Ruqian Lian, Si Zhao, Lituo Zheng, Yiyin Huang, Mingdeng Wei, Sanjay Mathur, Zhensheng Hong
Summary: In this study, a method of using 3D spaced TiO2 nanotube arrays as a substrate and controlling the deposition behavior of sodium metal with the absorption-diffusion regulation strategy by uniformly coating ultra-fine metal nanocrystals was proposed. It was found that TiO2 substrate has higher sodiophilic activity and sodium absorption energy, while the diffusion of sodium on silver surface is easier, leading to the formation of a mixed Na-Ag layer. The STNTs-Ag || Na half-cell exhibited high Coulombic efficiency and stable cycling life.
CHEMICAL ENGINEERING JOURNAL
(2022)
